U. 8. GEOLOGICAL SURVEY 



BULLETIN 612 PLATE X 



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A. AN ARMORED DINOSAUR (STEGOSAURU5). 



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The bones of this animal, which was about 10 feet high, were found in the Morilson formation. 



B. A CARNIVOROUS DINOSAUR (ALL0SAURU5) PREYING ON ONE OF THE HERBIVOROUS 



DINOSAURS. 



